Centrifugal oil burner



Nov. 9 1926.

E. BURRELL CENTRIFUGAL OIL BURNER sheetsslief '1 Filed August 29, 1924 Nov! p Q I T I. E BURRELL csumrruup on, human Filed August 29,

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Patented Nov. 9, 192

ELLIS BU RRELL, OF CHICAGO, ILLINOIS, ASSIGNOR TO DRYING SYSTEMS, INC., A-

TEN OFFIQE.

CORPORATION OF ILLINOIS.

GENTRIFITGAL' on. BURNER.

Application filed August 29, 1924. Serial No. 1:34.945.

My. invention is concerned with oil burn-- ers of the centrifugal type, and is adapted vto produce a simple structure of the class embodying my invention; v

Figs. 2 and 3 are views of portions of the same on an enlarged scale, with parts thereof'in central, vertical section;

Fig. 4 is a top-plan view of thec-up, and Fig. 5 is a side elevation. of certain springs detached.

In carrying out my invention in its pre-' ferred form, I employ a high-speed electric motor operating, say, at a speed of twelve thousand revolutions per minute, and I preferably provide this motor with a pair of motor support brackets 11 to aid in the ease of installation. The motor has a horizontal armature shaft which is connected by the couplings to be described with the rotary atomizer cup 12, which operates in a manner well knownto those skilled in the art. This cup, which is best seen in Figs..2 and 4. is preferably drawn out ofsheet-metal, and consists of'the lower portion, which flares upward slightly and has the large circular opening'13 in the bottom to accommodate the shaft 14 upon which the cup is secured and the delivery pipe 15' for the oil. The bottom of the cup is open, as

described, except for the short, inwardly extending, horizontal flange upon which the oil is dropped from the nozzle 16 when the cup is rotating at the roper speed to insure the spraying action. he upper portion 17 of the cup is preferably flared at a considerably greater angle to the vertical than the lower portion to secure the desired projection of the oil for the flame. As a convenient means of.securing the same on the I shaftl l and also to secure the desired upward draft ofair, I employ the spider 18, best shown in Fig. 4, which is preferably stamped and drawn out of sheet-metal,- and has the central sleeve 19 fitting snugly on the upper end of 'the shaft 14, to which it is preferably secured by the pin 20.. The

spokes or arms 21 of the spider are. stamped out of the sheet-metal body and have their body portions slanted, as shown, so as to produce the desired draft fan action. The ends 22 of the arms 21 are reduced,'and shaped to snap into registering apertures 23 formed in the body of thecupfor this purpose. To secure the desired draft on the exterior of the cup, I employ the annulus 24, likewise preferably composed ofsheet-metal and having the downturned portion of the proper shape to fit on the lower,

portion of the cup, and to be secured thereto in any desired manner. The substantially-horizontal portion of the flange is stamped to form thereon any desired number of vanes 25, which are also inclined at the proper angle to secure the upward draft of air on the outside of the cup as the same is rotated.

The oil will be delivered by pressure through the pipe 15, and to insure that the oil isnot delivered until the cup is rotating at the proper speed, I prefrably employ the following structure: Secured upon the end of the motor 10 by the screws 26 is 'a hollow casting 27 which has on its outer end the bore 28 in which slides the Valve 29. This valve 29 contains the annular passage 30 which is adapted to register with the two ports 31 and 32 formed in the valve casing and connected by the compression couplings, 33 and 34 with the pipe 15 and the pipe 35, respectively. A helically-coiled, expanding spring 36 placed in the circular recess 37 formed in the end of the valve 29 and co-operating with the bottom of the recess 28 serves to hold the valve 29 normally in the position shown in Fig. 3, in

which the su ply of oil is shut off. To open the valve w on the motor has reachedthe proper speed, I employ the following means: The end 38 of the armature shaft has secured therein the plug 39, the outer end of baseyll, which has the bearing for thereduced conical end-42 of the valve 29. The" base 41' also supports,"through the sleeve 43 the fly-wheel 44, which on f the exterior of the internally-threaded sleeve portion of the" plug mechanism is enclosedwithinthe enlarged,

' fly-wheel 44, faided by the pressure. of the spring 36, causes hollow ortion of prefera ly filled .with lubrlcating Whenv the motor is attaining the high speed at which it is normally operated, the lag ef' the fly-wheel44 due'to its inertia' causes itto be' moved to. the left to the dotted-line where the port is in reg-' position shown, I is ter with the ports 31 and :32 so that the oil can be delivered. Y When, the'motor-is stopped,"as.-it slows down, the drag of'the th e fly w'heel 44 to move by' reason or its threads to the rightuntil I thefull-line position is reached, in which the helical-ly-coiled, torsion "spring. 46, which said other end is The connections from the other end of the armature shaft '38 to the shaft 14 are preferably constructed as follows:- The reduced and tapered, as has secured thereon the seen at 45, and

I has its other end secured on the reduced I 'nections described, and which is preferably and tapered end 48, which 49 mounted 50, which is 47 of the intermediate shaft in the upper end of tlie casing provided to contain the con filled with lubricating oil-to insure ease of operation. A cap. 51 is secured to the caslower; portion of the shaft 14. Instead 'of' I discharging downward through, an

employing a single spring 56,1 preferably I employ two springs wound together and having",,t he same diameter. This spring 'connection 56 enables the cup and the shaft -l4'to which it issecured to find its true center of rotation even'if the bearings for the shaft 48 should not be exactly adjusted. "I preferably provide'forv the lubrication of x the bearings 49 by securing on the adjacent end ,of the shaft 38 thesmallrotary pump- 58 which .co-operates'with a suitable pump casing 59 formed in-the casting'50, and

provided with the pipe .60 leading therefrom;

has a bearing 'not be further-elaborated; i

described inventioii as' embodied in the form which 39, All this the casting 27 which is' oil.-

- art.

fect ofhigh speed, 'said shaft.

is, provided with the ball bearings a erture 61in tiieftop'of the cap 53 in a manner-thahwill be readily apparent.

/The operation'of theforegoing apparatus will. be readily. understood from the 'foreoin description of the structure, and need y ile-I have shown and at present consider best adapted to carry out .its'purpos'es, it will be understood that I it is capable of modifications, and that I do not desii'eto be limited. in the interpre tationof the following claims except as may be necessitated by the state of the prior VVhat I claim as new, and desire to secure by Letters Patent of the United States, is:

1. In an-oil burner an atomizer, a re'si'l lent-shaft supporting said atomizer at one endand a bearing for said shaft distantly located with respect to the atomizer a .sufficient'extent to utilize the flexibility of the shaft for permitting the atomizer to seek a center ofrotation under the gyrostatic ef- 2. In'an oil burner an utilized for permittingthe cup to move to a position of minimum resistance under the gyrostatic force developed-by the rotation of thecup, and means for rotating said shaft and atomizing cup. i

3. In-an oilburner, the combination with an upper shaftsection, '.having an atomizand means for rotating atomizer cup, means for feeding liquid fuel to said cup, a supporting shaft for said cup, said shaft being resilient, a bearing for said shaft-suf- 'ficiently. removed from theatomizing cup I so that the resilience of the shaft may be ingmember secured toward the upper end thereof, of a lower shaft ',se'etion, means for rotating the lower section: and .a strong coiled drive 'spring connecting the-adjacent ends of the two shaft' sections so that. the

upper shaft section and itsat'omizing memj ber can assume their true center of rotation.

l. Inan oil. burner, the combination with an upper shaft section, having an atomiz ing member secured toward the upper end thereof, of a lower shaft section, means for p I rotat ng the lower section, and a. strong coiled drive spring connecting the adjacent I ends of the two shaft sections so that the upper shaft sectionand'its atomizing member can assume their true center of rotation, said shaft sections having their adjacent ends cupped with the ends ofthe driv spring secured in'said'cups; In witness whereof, I have my hand this 16th..day of July, 1924.

j ELLIS BURREL I;

hereunto 'set' 

